Connector development M Taguchikyoto T 2 K ND

Contents • • • MPPC new ceramic package Prototype of connector Reproducibility Future development

MPPC new ceramic package • New MPPC package delivered in Oct. • Baseline package

Requirement to the connector • light yield - alignment - minimize the distance b/w

Prototype 1 ~2 parts type~ fiber screw MPPC • 2 parts • Touch the

Prototype 2 ~3 parts type~ fiber fixture screw MPPC • 3 parts • Touch

Reproducibility light yield (arbi. unit) 2 parts type light yield (arbi. unit) 3 parts

Characteristics of each connector Type Light yield Easy handling cost reproducibility size 2 parts

Cap Type Package fiber ( Rough draft ) stop by friction. MPPC Spring •

Summary • developed the 2 type of connectors which match the new ceramic package

Alignment • make alignment of MPPC to a fiber with the outside frame of

Setup for measurement of PDE with connector same amount of light connector WLSF blue

setup for measurement of PDE scan PMT blue LED WLSF 1 mmφslit MPPC PDE(MPPC)

Slides: 15

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Connector development M. Taguchi(kyoto) T 2 K ND 280 meeting@KEK Nov. 7. 2006

Contents • • • MPPC new ceramic package Prototype of connector Reproducibility Future development Summary

MPPC new ceramic package • New MPPC package delivered in Oct. • Baseline package for T 2 K sensitive region 4 mm 6 mm • We developed the connector to a fiber which match this package

Requirement to the connector • light yield - alignment - minimize the distance b/w fiber and MPPC • Easy handling • Compact size • reproducibility • Low-cost • Detaching is possible

Prototype 1 ~2 parts type~ fiber screw MPPC • 2 parts • Touch the edge of fiber to the surface of MPPC with screw • It is impossible to screw when fiber and MPPC are fixed

Prototype 2 ~3 parts type~ fiber fixture screw MPPC • 3 parts • Touch the edge of fiber to the surface of MPPC with screw • It is possible to screw when fiber and MPPC are fixed

Reproducibility light yield (arbi. unit) 2 parts type light yield (arbi. unit) 3 parts type +15% reproducibility is better for 2 parts type -15% blue LED connector WLSF • measure the light from fiber, attaching and detaching the connector repeatedly

Characteristics of each connector Type Light yield Easy handling cost reproducibility size 2 parts Now studying Bad ~0. 1$ Good(~2%) 1 x 1 cm 3 parts Now studying Good ~0. 1$ Bad(~10%) 1 x 1 cm the connector which have advantages of both types? - good reproducibility 2 parts - can connect the fiber and MPPC even if they are fixed cap type package without screw

Cap Type Package fiber ( Rough draft ) stop by friction. MPPC Spring • 2 parts • fixture for fiber stops by friction against the fixture for MPPC • use spring to touch the edge of fiber to the surface of MPPC we will make and test this soon

Summary • developed the 2 type of connectors which match the new ceramic package - reproducibility is better for 2 parts type - handling is easier for 3 parts type • now consider new type of connector • measurement of PDE with connector is on going

Supplement

Alignment • make alignment of MPPC to a fiber with the outside frame of package HPK say this size is made with best precision

Setup for measurement of PDE with connector same amount of light connector WLSF blue LED PDE(MPPC with connector) = /QE(PMT) PMT p. e. (MPPC) p. e. (PMT)

setup for measurement of PDE scan PMT blue LED WLSF 1 mmφslit MPPC PDE(MPPC) /QE(PMT) = p. e. (MPPC) p. e. (PMT)